Data cards. If you have the data card, in theory the factory can build it. Of course production has to be started by the appropriate Faction, a ship faction for a ship, a vehicle faction for a vehicle, an item faction for an item. You will find many people in a base faction will do what's called "Faction Hoping" so they can initiate production of items their faction needs.

Also, some groups rent out factories in certain central areas to other factions so that they can produce items much closer to a customer's home to save on shipping costs.

Borr, it only has to be less than 80 meters, not 10,000 m3. Correct me if I'm wrong, but it will ask you what piles of RM to draw on if they are in the city, IE they can be in a warehouse and still be used, but I might be wrong.

If you're going to give false information then just don't post, Lexxa.

Anything under 80 meters in length, as stated before.

Also, the 10,000 m3 isn't solely for the raw materials. The items being constructed need to be able to fit inside that volume as well. I've never built a W-23 in a factory, though, so I don't know whether that's in effect or not.

YT-series ships are a lot smaller than 80 meters in length. Of course you can construct those. However, they're not the limit, as you indicated. Now please stop embarrassing yourself. The question has been answered many times now..